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Please read: An urgent appeal from Wikipedia founder Jimmy Wales Base transceiver station From Wikipedia, the free encyclopedia
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An actual BTS device (Siemens BS11µBTS)
A typical BTS tower which holds the antenna. The tower is quite widely misinterpreted as the BTS itself. The shelter which houses the actual BTS can also be seen.
A mobile BTS
A BTS mounted on a building A base transceiver station (BTS) or cell site is a piece of equipment that facilitates wireless communication between equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless internet connectivity, WiFi and WiMAX gadgets etc. The network can be that of any of the wireless communication technologies like GSM, CDMA, WLL, WAN, WiFi, WiMAX etc. BTS is also referred to as the radio base station (RBS), node B (in 3G Networks) or, simply, the base station (BS). For discussion of the LTE standard the abbreviation eNB for enhanced node B is widely used.
Contents [hide] •
1 BTS in Mobile Communication
•
2 General Architecture
•
3 Important regarding a mobile BTS
•
4 See also
•
5 Further reading
•
6 External links
•
7 References
[edit] BTS in Mobile Communication A GSM network is made up of three subsystems: •
The Network and Switching Subsystem (NSS) – comprising an MSC and associated s.
•
The Base Station subsystem (BSS) – comprising a BSC and several BTSes
•
The Operations system - for maintenance of the network.
Though the term BTS can be applicable to any of the wireless communication standards, it is generally and commonly associated with mobile communication technologies like GSM and CDMA. In this regard, a BTS forms part of the base station subsystem (BSS) developments for system management. It may also have equipment for encrypting and decrypting communications, spectrum filtering tools (band filters) etc. antennas may also be considered as components of BTS in general sense as they facilitate the functioning of BTS. Typically a BTS will have several transceivers (TRXs) which allow it to serve severaldifferent frequencies and different sectors of the cell (in the case of sectorised base
stations). A BTS is controlled by a parent base station controller via the base station control function (BCF). The BCF is implemented as a discrete unit or even incorporated in a TRX in compact base stations. The BCF provides an operations and maintenance (O&M) connection to the network management system (NMS), and manages operational states of each TRX, as well as software handling and alarm collection. The basic structure and functions of the BTS remains the same regardless of the wireless technologies.
[edit] General Architecture A BTS in general has the following parts: Transceiver (TRX) Quite widely referred to as the driver receiver (DRX). DRX are either in the form of single (sTRU), double(dTRU) or a composite Double Radio Unit (DRU). It basically does transmission and reception of signals. Also does sending and reception of signals to/from higher network entities (like the base station controller in mobile telephony) Power amplifier (PA) Amplifies the signal from DRX for transmission through antenna; may be integrated with DRX. Combiner Combines feeds from several DRXs so that they could be sent out through a single antenna. Allows for a reduction in the number of antenna used. Duplexer For separating sending and receiving signals to/from antenna.Does sending and receiving signals through the same antenna ports (cables to antenna). Antenna This is also considered a part of the BTS. Alarm extension system Collects working status alarms of various units in the BTS and extends them to operations and maintenance (O&M) monitoring stations. Control function Control and manages the various units of BTS including any software. On-the-spot configurations, status changes, software upgrades, etc. are done through the control function. Baseband receiver unit (BBxx) Frequency hopping, signal DSP, etc.
[edit] Important regarding a mobile BTS Diversity techniques To improve the quality of the received signal, often two receiving antennas are used, placed at an equal distance to an uneven multiple of a quarter of wavelength (for 900 MHz the wavelength it is 30 cm). This technique, known as antenna diversity or space diversity, avoids interruption caused by path fading. The antennas can be spaced horizontally or vertically. Horizontal spacing requires more complex installation, but better performance is obtained in this configuration. Other than antenna or space diversity, there are other diversity techniques such as frequency/time diversity, antenna pattern diversity, and polarization diversity. Splitting The flow of power within a particular area of the cell, known as sector. Every field can therefore be considered like one new cell. By using directional antennas, the cochannel interference is reduced. A typical structure is the trisector, also known as clover, in which there are three sectors, each one served by separate antennas. Every sector has a separate direction of tracking of 120° with respect to the adjacent ones. If not sectorised, the cell will be served by an omnidirectional antenna, which radiates in all directions. Bisectored cells are also implemented with the antennas serving sectors of 180° separation to one another.
[edit] See also
•
OpenBTS
[edit] Further reading •
Satoshi Maruyama, Katsuhiko Tanahashi, Takehiko Higuchi (2002). Base Transceiver Station for W-CDMA System. FUJITSU Sci. Tech. J. pp. 7. http://www.fujitsu.com/s/MAG/vol38-2/paper07.pdf.
[edit] External links Wikimedia Commons has media related to: Base station •
U.S. Patent 6,577,878
[edit] References This article needs additional citations for verification.
Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (June 2008)
Retrieved from "http://en.wikipedia.org/wiki/Base_transceiver_station" Categories: Telecommunications Hidden categories: Articles needing additional references from June 2008 | All articles needing additional references Personal tools
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This page was last modified on 14 December 2010 at 16:37.
•
Text is available under the Creative Commons Attribution-ShareAlike License; additional may apply. See of Use for details. Wikipedia® is a ed trademark of the Wikimedia Foundation, Inc., a non-profit organization.
•
us
•
•
About Wikipedia
•
Disclaimers
• •
Jump to: navigation, search
An actual BTS device (Siemens BS11µBTS)
A typical BTS tower which holds the antenna. The tower is quite widely misinterpreted as the BTS itself. The shelter which houses the actual BTS can also be seen.
A mobile BTS
A BTS mounted on a building A base transceiver station (BTS) or cell site is a piece of equipment that facilitates wireless communication between equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless internet connectivity, WiFi and WiMAX gadgets etc. The network can be that of any of the wireless communication technologies like GSM, CDMA, WLL, WAN, WiFi, WiMAX etc. BTS is also referred to as the radio base station (RBS), node B (in 3G Networks) or, simply, the base station (BS). For discussion of the LTE standard the abbreviation eNB for enhanced node B is widely used.
Contents [hide] •
1 BTS in Mobile Communication
•
2 General Architecture
•
3 Important regarding a mobile BTS
•
4 See also
•
5 Further reading
•
6 External links
•
7 References
[edit] BTS in Mobile Communication A GSM network is made up of three subsystems: •
The Network and Switching Subsystem (NSS) – comprising an MSC and associated s.
•
The Base Station subsystem (BSS) – comprising a BSC and several BTSes
•
The Operations system - for maintenance of the network.
Though the term BTS can be applicable to any of the wireless communication standards, it is generally and commonly associated with mobile communication technologies like GSM and CDMA. In this regard, a BTS forms part of the base station subsystem (BSS) developments for system management. It may also have equipment for encrypting and decrypting communications, spectrum filtering tools (band filters) etc. antennas may also be considered as components of BTS in general sense as they facilitate the functioning of BTS. Typically a BTS will have several transceivers (TRXs) which allow it to serve severaldifferent frequencies and different sectors of the cell (in the case of sectorised base
stations). A BTS is controlled by a parent base station controller via the base station control function (BCF). The BCF is implemented as a discrete unit or even incorporated in a TRX in compact base stations. The BCF provides an operations and maintenance (O&M) connection to the network management system (NMS), and manages operational states of each TRX, as well as software handling and alarm collection. The basic structure and functions of the BTS remains the same regardless of the wireless technologies.
[edit] General Architecture A BTS in general has the following parts: Transceiver (TRX) Quite widely referred to as the driver receiver (DRX). DRX are either in the form of single (sTRU), double(dTRU) or a composite Double Radio Unit (DRU). It basically does transmission and reception of signals. Also does sending and reception of signals to/from higher network entities (like the base station controller in mobile telephony) Power amplifier (PA) Amplifies the signal from DRX for transmission through antenna; may be integrated with DRX. Combiner Combines feeds from several DRXs so that they could be sent out through a single antenna. Allows for a reduction in the number of antenna used. Duplexer For separating sending and receiving signals to/from antenna.Does sending and receiving signals through the same antenna ports (cables to antenna). Antenna This is also considered a part of the BTS. Alarm extension system Collects working status alarms of various units in the BTS and extends them to operations and maintenance (O&M) monitoring stations. Control function Control and manages the various units of BTS including any software. On-the-spot configurations, status changes, software upgrades, etc. are done through the control function. Baseband receiver unit (BBxx) Frequency hopping, signal DSP, etc.
[edit] Important regarding a mobile BTS Diversity techniques To improve the quality of the received signal, often two receiving antennas are used, placed at an equal distance to an uneven multiple of a quarter of wavelength (for 900 MHz the wavelength it is 30 cm). This technique, known as antenna diversity or space diversity, avoids interruption caused by path fading. The antennas can be spaced horizontally or vertically. Horizontal spacing requires more complex installation, but better performance is obtained in this configuration. Other than antenna or space diversity, there are other diversity techniques such as frequency/time diversity, antenna pattern diversity, and polarization diversity. Splitting The flow of power within a particular area of the cell, known as sector. Every field can therefore be considered like one new cell. By using directional antennas, the cochannel interference is reduced. A typical structure is the trisector, also known as clover, in which there are three sectors, each one served by separate antennas. Every sector has a separate direction of tracking of 120° with respect to the adjacent ones. If not sectorised, the cell will be served by an omnidirectional antenna, which radiates in all directions. Bisectored cells are also implemented with the antennas serving sectors of 180° separation to one another.
[edit] See also
•
OpenBTS
[edit] Further reading •
Satoshi Maruyama, Katsuhiko Tanahashi, Takehiko Higuchi (2002). Base Transceiver Station for W-CDMA System. FUJITSU Sci. Tech. J. pp. 7. http://www.fujitsu.com/s/MAG/vol38-2/paper07.pdf.
[edit] External links Wikimedia Commons has media related to: Base station •
U.S. Patent 6,577,878
[edit] References This article needs additional citations for verification.
Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (June 2008)
Retrieved from "http://en.wikipedia.org/wiki/Base_transceiver_station" Categories: Telecommunications Hidden categories: Articles needing additional references from June 2008 | All articles needing additional references Personal tools
•
/ create
Namespaces
•
Article
•
Discussion
Variants Views
•
Read
•
Edit
•
View history
Actions Search Top of Form Special:Search
Search
Bottom of Form
Navigation
•
Main page
•
Contents
•
Featured content
•
Current events
•
Random article
•
Donate to Wikipedia
Interaction
•
Help
•
About Wikipedia
•
Community portal
•
Recent changes
•
Wikipedia
Toolbox
•
What links here
•
Related changes
•
file
•
Special pages
•
Permanent link
•
Cite this page
Print/export
•
Create a book
•
as PDF
•
Printable version
Languages
•
Deutsch
•
Español
•
Français
•
한국어
•
Italiano
•
Nederlands
•
Polski
•
Svenska
•
This page was last modified on 14 December 2010 at 16:37.
•
Text is available under the Creative Commons Attribution-ShareAlike License; additional may apply. See of Use for details. Wikipedia® is a ed trademark of the Wikimedia Foundation, Inc., a non-profit organization.
•
us
•
•
About Wikipedia
•
Disclaimers
• •
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